JP2005305913A - 樹脂材のレーザ溶着方法 - Google Patents
樹脂材のレーザ溶着方法 Download PDFInfo
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- JP2005305913A JP2005305913A JP2004128324A JP2004128324A JP2005305913A JP 2005305913 A JP2005305913 A JP 2005305913A JP 2004128324 A JP2004128324 A JP 2004128324A JP 2004128324 A JP2004128324 A JP 2004128324A JP 2005305913 A JP2005305913 A JP 2005305913A
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Abstract
【解決手段】 レーザ光Lに対して透過性の材料からなる押え治具3が、レーザ光に対して透過性のある第2の樹脂材2に面する対向面に凸条部31が設けられており、この凸条部31で第1と第2の樹脂材1,2を押圧した状態で、レーザ光Lを凸条部を通って溶着部に照射する。透明な押え治具に凸条部を設けることで溶融膨張による圧力に十分に対処することができる加圧力を確保できる。また、透明な押え治具3に凹条溝部32を設けることも可能である。
【選択図】 図1
Description
また、本出願人が先に提案したように、吸収性樹脂材にリブ(突起)を設けることで面圧を確保し、両樹脂材間の隙間を無くすことで良好な溶着を得るという方法では、両樹脂材間の継ぎ手形状が複雑化するため、樹脂材の成形型の設計が困難であるという短所がある。このため、樹脂製品の形状はそのままで、即ち成形型はそのままで、治具によりレーザ溶着品質を確保するレーザ溶着技術が早期に確立する必要が求められている。
本発明の第2の目的は、透明な押え治具と透過性樹脂材との熱伝導を防止して、押え治具の汚染を防ぎ、押え治具の交換を削減して、コストの低減を図ることができる樹脂材のレーザ溶着方法を提供することである。
請求項1に記載の樹脂材のレーザ溶着方法は、レーザ光に対して透過性の材料からなる押え治具であって、レーザ光に対して透過性のある第2の樹脂材に面するこの押え治具の対向面に凸条部を形成し、この凸条部で密着した第1、第2の樹脂材を押圧した状態で、レーザ光を凸条部を通って溶着部に照射するようにしたものであり、これにより、樹脂材側の継ぎ手形状を考慮することなく、治具側の構造を変えることによって、両樹脂材間の溶着部に十分な面圧を付加することができ、良好な溶着が達成できる。
請求項2の該レーザ溶着方法は、押え治具の凸条部の上面を平坦にしたものであり、これにより、面圧を溶着部に有効に付加することができる。
請求項4の該レーザ溶着方法は、第2の樹脂材に面する第1の樹脂材の対向面に、押え治具の凹条溝部に対応して凸条部を形成したものであり、これにより、一層効率よく両樹脂材間の溶着部に十分な面圧を付加することができる。
請求項6の該レーザ溶着方法は、押え治具の凹条溝部の幅と第1の樹脂材の凸条突部の幅とを略同一になるようにしたものであり、これにより、両樹脂材間の溶着部に有効に面圧を加えることができると共に、押え治具と第2の樹脂材間の熱伝達も効果的に防止できる。
なお、レーザ光Lは、凸条部31を透過して接合部(溶着部)に照射される。
押え治具3は、その大部分が溶接対象物である樹脂材1、2の形状に沿った平板状あるいは曲面状の形状に形成されることができる。押え治具3は、その大部分の面で樹脂材1、2を互いに押し付けるように樹脂材2に接触することができる。凸条部31は、凸状部とも呼びうるものである。凸条部31は、押え治具3の一部分にのみ形成されている。凸条部31は、それが形成された位置の近傍の押え治具3の面より樹脂材2に向けて突出する。凸条部31は、樹脂材1、2の間に形成される溶着部の形状に対応して広がる形状をもつことができる。凸条部31は、レーザ光Lの照射経路に沿った範囲に渡って広がる形状をもつことができる。レーザ光Lが走査され、その照射経路が細長く延びる場合には、凸条部31は、押え治具3の面上に条線として細長く延在して形成されることができる。レーザ光Lが点状に照射される場合には、凸条部31は、円柱状突起として形成することができる。また、レーザ光Lが接近してあるいは重複してラスタスキャンされる場合には、凸条部31は、所定の範囲に広がる凸状台地として形成することができる。
この第1実施形態によると、少なくとも2つの樹脂材1、2を部分的に溶着してなる樹脂成形品が得られる。樹脂材1、2は、予め所定の形状に成形された後に、溶着されることができる。樹脂成形品は、2つの樹脂材1、2の接触面において両樹脂材を部分的に溶融、再硬化させて接合して形成されている。樹脂成型品は、その内部に溶融痕跡としての溶着部を有している。そして、その溶着部に対応する樹脂成型品の表面には、樹脂成型品をその厚さ方向に押圧した痕跡としての押圧痕を有することができる。例えば、溶着部の上に押圧痕は位置することができる。この押圧痕は、押え治具3の凸条部31に対応して、樹脂成形品の表面のうち、溶着部に対応する部位にのみ形成されることができる。例えば、細長く延在する溶着部に沿って延在して形成されることができる。押圧痕は、透明な樹脂材2の表面にのみ形成されることができる。
押え治具3は、その大部分が溶接対象物である樹脂材1、2の形状に沿った平板状あるいは曲面状の形状に形成されることができる。押え治具3は、その大部分の面で樹脂材1、2を互いに押し付けるように樹脂材2に接触することができる。凹条溝部32は、押え治具3の一部分にのみ形成されている。凹条溝部32は、凹状部とも呼びうるものである。凹条溝部32は、それが形成された位置の近傍の押え治具3の面より樹脂材2から離れて位置する底面と、凹条溝部32を区画する側壁とを有する。凹条溝部32は、樹脂材1、2の間に形成される溶着部の形状に対応して広がる形状をもつことができる。凹条溝部32は、レーザ光Lの照射経路に沿った範囲に渡って広がる形状をもつことができる。レーザ光Lが走査され、その照射経路が細長く延びる場合には、凹条溝部32は、押え治具3の面上に凹型断面をもった溝として細長く延在して形成されることができる。レーザ光Lが点状に照射される場合には、凹条溝部32は、穴状に形成することができる。また、レーザ光Lが接近してあるいは重複してラスタスキャンされる場合には、凹条溝部32は、所定の範囲に広がる凹状盆地として形成することができる。
この第2実施形態によると、少なくとも2つの樹脂材1、2を部分的に溶着してなる樹脂成形品が得られる。樹脂材1、2は、予め所定の形状に成形された後に、溶着されることができる。樹脂成形品は、2つの樹脂材1、2の接触面において両樹脂材を部分的に溶融、再硬化させて接合して形成されている。樹脂成型品は、その内部に溶融痕跡としての溶着部を有している。そして、その溶着部に対応する樹脂成型品の表面には、樹脂成型品をその厚さ方向に押圧した痕跡としての押圧痕が残されない。押圧痕は、樹脂成形品の表面のうち、溶着部に対応しない部位に残されることができる。この押圧痕は、樹脂成形品の表面のうち、溶着部に対応する部位にのみ残されない。押圧痕は、透明な樹脂材2の表面にのみ形成されることができる。
レーザ光を透過する第2の樹脂材2の種類としては、熱可塑性を有し、レーザ光に対して所定以上の透過率を有するものであれば特に限定されない。基本的に上記に例示した樹脂材が使用可能である。また透過性を確保できれば着色材を混入してもよい。
なお、第1及び第2の樹脂材1,2には、必要に応じて、ガラス繊維やカーボン繊維などの補強繊維を添加してもよい。
更に、吸収性樹脂材に凸条部を設け、透明な押え治具に凹条溝を設けることでも同様の溶着効果が得られ、押え治具の傷、汚れによる交換等の必要が少なくなりコストダウンを図ることもできる。
11…凸条部
2…第2の樹脂材(透過性樹脂材)
3…押え治具
31…凸条部
32…凹条溝部
L…レーザ光
Claims (7)
- レーザ光に対して吸収性のある第1の樹脂材と、レーザ光に対して透過性のある第2の樹脂材とを重ね合わせると共に、レーザ光に対して透過性の材料からなる押え治具によって前記第1と第2の樹脂材とを互いに密着させるように押圧している状態で、前記第2の樹脂材に面する前記押え治具側によりレーザ光を照射して、前記第1の樹脂材を加熱して、互いに両樹脂材を溶融することで両者を溶着する樹脂材のレーザ溶着方法において、
前記第2の樹脂材に面する前記押え治具の対向面に、溶着部に対応して凸条部を形成すると共に、前記凸条部で両樹脂材を押圧した状態で、レーザ光を前記凸条部を通って溶着部に照射することを特徴とする樹脂材のレーザ溶着方法。 - 前記凸条部の上面が平坦であることを特徴とする請求項1に記載の樹脂材のレーザ溶着方法。
- レーザ光に対して吸収性のある第1樹脂材と、レーザ光に対して透過性のある第2の樹脂材とを重ね合わせると共に、レーザ光に対して透過性の材料からなる押え治具によって前記第1と第2の樹脂材とを互いに密着させるように押圧している状態で、前記第2の樹脂材に面する前記押え治具側によりレーザ光を照射して、前記第1の樹脂材を加熱して、互いに両樹脂材を溶融することで両者を溶着する樹脂材のレーザ溶着方法において、
前記第2の樹脂材に面する前記押え治具の対向面に、溶着部に対応して凹条溝部を形成すると共に、前記押え治具で両樹脂材を押圧した状態で、レーザ光を前記凹条溝部を通って溶着部に照射することを特徴とする樹脂材のレーザ溶着方法。 - 前記第2の樹脂材に面する前記第1の樹脂材の対向面に、前記押え治具の前記凹条溝部に対応して凸条部を形成することを特徴とする樹脂材のレーザ溶着方法。
- 前記第1の樹脂材の前記凸条部の上面が平坦であることを特徴とする請求項4に記載の樹脂材のレーザ溶着方法。
- 前記押え治具の前記凹条溝部の幅と、前記第1の樹脂材の前記凸条部の幅とが、略同一であることを特徴とする請求項4又は5に記載の樹脂材のレーザ溶着方法。
- 前記押え治具の透過性材料が、ポリカーボネート(PC)か、PCをコーティングした材料、又は強化ガラスであることを特徴とする請求項1〜6のいずれか一項に記載の樹脂材のレーザ溶着方法。
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JP2007261666A (ja) * | 2006-03-29 | 2007-10-11 | Kirin Holdings Co Ltd | 密封容器の製造装置及び密封容器の製造方法 |
JP2012196850A (ja) * | 2011-03-22 | 2012-10-18 | Koito Mfg Co Ltd | 溶着方法及び溶着装置 |
CN104608374A (zh) * | 2013-11-01 | 2015-05-13 | 株式会社小糸制作所 | 熔敷方法以及熔敷装置 |
JP2018196193A (ja) * | 2017-05-15 | 2018-12-06 | 株式会社ミツバ | モータ装置およびその製造方法 |
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JP2007261666A (ja) * | 2006-03-29 | 2007-10-11 | Kirin Holdings Co Ltd | 密封容器の製造装置及び密封容器の製造方法 |
JP2012196850A (ja) * | 2011-03-22 | 2012-10-18 | Koito Mfg Co Ltd | 溶着方法及び溶着装置 |
CN104608374A (zh) * | 2013-11-01 | 2015-05-13 | 株式会社小糸制作所 | 熔敷方法以及熔敷装置 |
JP2018196193A (ja) * | 2017-05-15 | 2018-12-06 | 株式会社ミツバ | モータ装置およびその製造方法 |
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